Wilhelm kock



(No Model.)

w. KOCK.

sun. No. 586,930. I I Patented July 20, 1897 INVENTOR I BY 7 ATTORNEYS.

WITNESSES UNITE STATES PATENT OFFICE.

\VILHELM KOOK, OF CINCINNATI, OHIO.

SAFE.

SPECIFICATION forming part of Letters Patent No. 586,930, dated July 20, 1897.

Application filed November 13, 1896. $eria1N0. 611,980- (No model.)

To aZZ whom it may concern:

Be it known that I, WILHELM KOCK, of Cincinnati, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in Safe Construction, of which the following is a full, clear, and exact description.

My invention relates to improvements in the manner of putting together the plates composing a safe-door, which will render it very difficult to detach them from each other by dynamite or by the use of tools.

The invention consists in the novel features as hereinafter particularly-described and defined in the claim.

Reference is to be had to the accompanying drawing, forming a part of this specification, in which the figure shows a cross-section of one edge of the door and its union with the safe.

Safe-doors as usually constructed consist of a series of plates secured to each other by bolts or rivets which are at right angles to the plates. It is a common thing for burglars to introduce nitroglycerin or other explosive beneath the layers and blow the same apart or'strip'the boltwork therefrom. This may be done quite easily, as the bolts are simply stripped.

In my invention the various plates forming the door of the safe are bent at right angles, as shown in the drawing. I have shown four layers of plates A, A, A and A These plates are bent at all corners, so as to form right-angle flanges. The plates are then secured to eachother by bolts a, passing through the flanges and parallel to the face of the door. Three of these bolts are shown by solid lines and others by dotted lines. In this form of construction if an explosive is introduced between the plates or back of the door and exploded it will be necessary in order to strip the plates that some of the bolts be sheared. This is not likely to happen, as there isa comparativelysmall space adjacent to the joint for the nitroglycerin to act upon. The bars B, carrying the locking-bolts O, are similarly secured to the plates by bolts 01-, en-

tering the flanges of the door-plates. The plates of the door may be. secured to each other by the usual bolts on the face thereof.

The opening about the door of the safe is formed as a series of steps by the projecting ends of the plates D, D, D and D The inner portion of each of these stepsthat is, the portion farthest removed from the end thereofis recessed, forming grooves b. The door of the safe is similarly formed by recessing the edges of the flanges. The edges of these flanges are grooved to correspond with the grooves in the stepsof the plates comprising the walls of the safe. When the door is closed together, these grooves will fit into each other, as shown in the drawing.-

A packing substance 0 may be inserted in the bottom of these grooves and will be compressed by the door in closing, and thus present another barrier to the entrance of nitroglycerin. The locking-bolt O and the mechanism for operating the same may be of any approved construction. With safes constructed .after my plan it will be extremely difficult to introduce nitroglycerin between the plates thereof or between the door and the body of the safe. Should the nitroglycerin be inserted and exploded, it will be much less liable-to rend the plate entirely loose than with the present form of construction, and in conse quence of this the safe will be practically burglar-proof.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A safe, having a door composed of built-up plates having their edges flanged at right angles to the body thereof, and each pair secured by bolts passing from the inside through the flanges of the inner plate and into the flange of the one next outside, and boltwork secured by bolts screwing into the flanges and parallel with the front face of the door, substantially as described.

WILHELM KOOK. Witnesses:

ALFRED HERHOLZ, VALENTIN SCHNEIDER. 

